| 摘要 |
PURPOSE:To manufacture a cylindrical roller machine wherein a center hollow is formed on a circular end face to improve a bearing life. CONSTITUTION:Center hollows 3, 3a are formed on circular end faces by performing peripheral surface grinding and end surface polishing against a column-shaped material and performing centrifugal barrel work or work by rotating a tilted cylindrical vessel, and a cylindrical roller of new type formed with the center hollows 3, 3a on the circular end faces is efficiently machined and manufactured by again performing the peripheral surface grinding. |
